Box for relay module https://aliexpi.com/cSJA. The box can be used with a din rail clip: https://www.printables.com/model/64242-din-rail-clip

This box is part of the project: https://www.printables.com/model/431150-raspberry-pico-w-bme680 and https://www.printables.com/model/580982-the-wallmount-cover-for-waveshare-7-led-display